Unlike driver updates, BIOS releases typically arrive far less often—usually when vendors add support for new CPUs, but also occasionally to improve stability and performance, or to address security vulnerabilities. Regarding the latter, HP is pushing out firmware updates for over 200 laptops and desktops to patch a pair of vulnerabilities

Source: Hot Hardware – HP BIOS Updates Fix Alarming Vulnerabilities Affecting 200 PCs, Patch ASAP